refactor: removed IE leftovers from src\client\core\utils (part 1) (#…

…7998)

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## Purpose
_Describe the problem you want to address or the feature you want to
implement._

## Approach
_Describe how your changes address the issue or implement the desired
functionality in as much detail as possible._

## References
_Provide a link to the existing issue(s), if any._

## Pre-Merge TODO
- [ ] Write tests for your proposed changes
- [ ] Make sure that existing tests do not fail

src/client/core/utils/array.js

@@ -28,32 +28,11 @@ export function isArray (arg) {
 }
 
 export function from (arg, ...args) {
-    if (nativeMethods.arrayFrom)
-        return nativeMethods.arrayFrom(arg, ...args);
-
-    // NOTE: this logic is for IE
-    const arr    = [];
-    const length = arg.length;
-
-    for (let i = 0; i < length; i++)
-        arr.push(arg[i]);
-
-    return arr;
+    return nativeMethods.arrayFrom(arg, ...args);
 }
 
 export function find (arr, callback) {
-    if (nativeMethods.arrayFind)
-        return nativeMethods.arrayFind.call(arr, callback);
-
-    // NOTE: this logic is for IE
-    const length = arr.length;
-
-    for (let i = 0; i < length; i++) {
-        if (callback(arr[i], i, arr))
-            return arr[i];
-    }
-
-    return null;
+    return nativeMethods.arrayFind.call(arr, callback);
 }
 
 export function remove (arr, item) {

src/client/core/utils/content-editable.js

@@ -285,23 +285,15 @@ export function getNearestCommonAncestor (node1, node2) {
 
 //selection utils
 function getSelectedPositionInParentByOffset (node, offset) {
-    let currentNode          = null;
-    let currentOffset        = null;
-    const childNodes         = nativeMethods.nodeChildNodesGetter.call(node);
-    const childCount         = domUtils.getChildNodesLength(childNodes);
-    let isSearchForLastChild = offset >= childCount;
-
     // NOTE: we get a child element by its offset index in the parent
     if (domUtils.isShadowUIElement(node))
         return { node, offset };
 
-    // NOTE: IE behavior
-    if (isSearchForLastChild)
-        currentNode = childNodes[childCount - 1];
-    else {
-        currentNode   = childNodes[offset];
-        currentOffset = 0;
-    }
+    const childNodes         = nativeMethods.nodeChildNodesGetter.call(node);
+    const childCount         = domUtils.getChildNodesLength(childNodes);
+    let isSearchForLastChild = offset >= childCount;
+    let currentNode          = childNodes[offset];
+    let currentOffset        = 0;
 
     // NOTE: skip shadowUI elements
     if (domUtils.isShadowUIElement(currentNode)) {

src/client/core/utils/event-emitter.ts

@@ -47,19 +47,7 @@ export default class EventEmitter {
         if (!listeners)
             return;
 
-        for (let i = 0; i < listeners.length; i++) {
-            try {
-                listeners[i].apply(this, args);
-            }
-            catch (e: any) {
-                // Hack for IE: after document.write calling IFrameSandbox event handlers
-                // rises 'Can't execute code from a freed script' exception because document has been
-                // recreated
-                if (e.message && e.message.indexOf('freed script') > -1)
-                    this.off(evt, listeners[i]);
-                else
-                    throw e;
-            }
-        }
+        for (let i = 0; i < listeners.length; i++)
+            listeners[i].apply(this, args);
     }
 }

src/client/core/utils/event.js

@@ -6,7 +6,6 @@ import * as domUtils from './dom';
 const Promise       = hammerhead.Promise;
 const nativeMethods = hammerhead.nativeMethods;
 const listeners     = hammerhead.eventSandbox.listeners;
-const browserUtils  = hammerhead.utils.browser;
 
 // Imported form the hammerhead
 export const BUTTON            = hammerhead.utils.event.BUTTON;
@@ -17,17 +16,11 @@ export const WHICH_PARAMETER   = hammerhead.utils.event.WHICH_PARAMETER;
 export const preventDefault = hammerhead.utils.event.preventDefault;
 
 export function bind (el, event, handler, useCapture) {
-    if (browserUtils.isIE11 && domUtils.isWindow(el))
-        nativeMethods.windowAddEventListener.call(el, event, handler, useCapture);
-    else
-        nativeMethods.addEventListener.call(el, event, handler, useCapture);
+    nativeMethods.addEventListener.call(el, event, handler, useCapture);
 }
 
 export function unbind (el, event, handler, useCapture) {
-    if (browserUtils.isIE11 && domUtils.isWindow(el))
-        nativeMethods.windowRemoveEventListener.call(el, event, handler, useCapture);
-    else
-        nativeMethods.removeEventListener.call(el, event, handler, useCapture);
+    nativeMethods.removeEventListener.call(el, event, handler, useCapture);
 }